Results 101 to 110 of about 845,218 (299)

A rock brittleness index based on the postpeak energy release rate and damage surface characteristics for brittle hard rock

Deep Underground Science and Engineering, EarlyView.
This study examines energy evolution in rock rupture via triaxial direct shear tests, exploring the impact of confining pressure and temperature on fracture surface randomness. A novel energy‐based brittleness index is proposed, validated experimentally, and compared with existing methods for reliability and accuracy.
Biao Wang, Zaobao Liu, Jing Xue, Bo Lu, Wei Zeng, Dengke Zhang   +5 more
wiley   +1 more source

Modeling and experimental validation of bolt–grout bond–slip behavior for deep underground excavation support

Deep Underground Science and Engineering, EarlyView.
A novel shear‐lag model, validated by pull‐out tests, incorporates a constant bond stress stage to predict the complete load–displacement response of grouted rock bolts, providing a new tool for optimizing anchorage length and material toughness in deep underground engineering. Abstract The stability of rock masses in deep underground excavations, such
Wenhui Bian, Xiaohui He, Kexue Wang, Yufei Wu, Guoxin Wang, Shaochen Zhang, Jun Yang   +6 more
wiley   +1 more source

Intelligent prevention and control method of deep rock burst and its development path

Gong-kuang zidonghua, 2019
In order to solve the safety problem of deep intelligent mining and prevention and control personnel threatened by rock burst, an intelligent prevention and control method of deep rock burst was put forward.
PAN Junfeng, LIU Shaohong, MA Wentao, FENG Meihua, WANG Shuwen, GAO Jiaming   +5 more
doaj   +1 more source

Damage Evaluation for Rock Burst Proneness of Deep Hard Rock under Triaxial Cyclic Loading

, 2018
High stress and strong excavation disturbance are the main causes of dynamic disasters, rock burst in deep hard rocks, and are more frequent and violent than those in shallow, which seriously restricts the deep mining.
Chenghan Zhang, Shuang You, Zijian Zhang, Hongguang Ji   +3 more
core   +1 more source

Study on Microseismic Monitoring, Early Warning, and Comprehensive Prevention of a Rock Burst under Complex Conditions

, 2020
Rock bursts in coal mines are usually unpredictable. In view of this problem, the energy–frequency relationship and spatial distribution characteristics of microseismic events during the mining of 5305 working face in Xinhe Coal Mine under complex ...
Wenmiao Wang, Lianguo Wang, Bo Ren, Ke Ding, Mei Yu   +4 more
core   +1 more source

Simplified overflow analysis of an optical burst switch with fibre delay lines [PDF]

, 2009
We develop an approximate analytic model of an Optical Burst Switch with share-per-node fibre delay lines and tuneable wavelength converters by employing Equivalent Random Theory, an approach from circuit-switching analysis.
Barry, Liam P., McArdle, Conor J., Thomas Curran, Anthony Holohan, Holohan, Anthony, Daniele Tafani, Tafani, Daniele, Liam P. Barry, Curran, Thomas, Conor McArdle   +9 more
core   +2 more sources

Mechanism and disaster control new technology of strong ground pressure manifestation in ultra‐large mining face

Deep Underground Science and Engineering, EarlyView.
In response to the problem of strong mining pressure manifestation along the goaf roadway in a thick coal seam mining area, this study uses a new type of combined blasting roof cutting technology to effectively control the manifestation and deformation of mining pressure along the goaf roadway.
Xiaoding Xu, Manchao He, Jun Yang, Yubing Gao, Qiang Fu, Qing Ma, Yajun Wang   +6 more
wiley   +1 more source

Evolution Law of Stress Field and Pressure Relief Effect of Coal Seam After Drilling

Energy Science & Engineering
As an effective means of coal burst prevention, large‐diameter drilling pressure relief technology have been widely used in coal burst mines in China. Engineering practice shows that drilling pressure relief has obvious time‐effect.
Yanchun Yin, Chuanru Yao, Yueyong Han, Yue Qiu, Changqing Li, Yang Chen   +5 more
doaj   +1 more source

Dynamic geo‐hydrogeological monitoring‐driven situational awareness for real‐time floor water inrush risk prediction in deep mining

Deep Underground Science and Engineering, EarlyView.
The fused data extracted from the distributed monitoring system as the data basis, combined with dynamic geological data, are imported into a deep learning model. As the geological conditions of mining and excavation change, the risk of water inrush at the working face is retrieved in real time.
Yongjie Li, Huiyong Yin, Fangying Dong, Tao Wu, Chao Zhang   +4 more
wiley   +1 more source

Influencing factors and distribution characteristics of rock burst under complex geological dynamic environment

Meitan kexue jishu
Rock burst results from the interaction of multiple factors. Its occurrence is not only related to mining engineering effects but also closely linked to the geo-dynamic environment of the mine.
Hai RONG, Shilong WEI, Hongwei ZHANG, Linlin CHEN, Nannan LI   +4 more
doaj   +1 more source